"This is not emailing files back and forth as attachments. Instead, you're managing and sharing documents with online storage, version control, user rights and change notification," said Farzin Arsanjani, president of HyperOffice.

HyperOffice enables iPhone users to share group and project calendars with team members and clients who also use Outlook and HyperOffice. Users may also retrieve; share and update address books, projects and tasks, and manage documents with online storage, versioning, user rights and commenting. HyperOffice also provides discussion groups, security and backup; and business-class email without spam and viruses.

Plus, if you're working on a Mac or PC, HyperOffice also offers web conferencing, Exchange and Sharepoint functionality, Outlook sync, Intranet/Extranet page and portal builders, time and expense tracking, and an online database application.